Malicious PDF — malware analysis report

Static analysis result for SHA-256 9d9971977b0c14a3…

MALICIOUS

PDF

80.1 KB Created: 2021-09-19 05:24:04 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-14
MD5: d33a59bf7f8c15a9ccd7cbf727ed9615 SHA-1: f17456818e67a19b99b8d86c5b8f65badbc8e16b SHA-256: 9d9971977b0c14a35e7e41844304d147a9dc46809afcaef87ed625e8bd0e5930
134 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains embedded JavaScript and a high number of external URIs, many of which point to disposable domains, indicating a phishing or malware distribution attempt. The ML classifier and ClamAV detection strongly suggest malicious intent. The embedded JavaScript likely facilitates the redirection to these external sites.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9953

Heuristics 6

  • ClamAV: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0
  • Small PDF is a non-clustered link farm on disposable hosting medium PDF_SEO_DISPOSABLE_LINK_FARM
    Small PDF contains many clickable external PDF links spread thin across many distinct hosts (no single dominant host), corroborated by a utm_term SEO-redirector link and/or links parked on free/disposable content hosts. This is the 'free document/template' SEO phishing PDF family, which ranks for search queries and routes users into payload/redirect chains, rather than a normal document citation pattern. The PDF itself carries no exploit — the risk is the linked destinations.
  • Embedded JS stream low PDF_JS
    PDF references a /JS stream. Generic JavaScript is common in benign forms; specific dangerous APIs are scored by separate rules.
  • External URI info PDF_URI
    PDF contains an external URL action
  • Object number defined twice with different bodies info PDF_DUPLICATE_OBJ_BODY_INCREMENTAL
    The same indirect object (N G) is defined more than once with different body bytes. First-wins and last-wins readers will resolve different content, which is a parser-confusion shape used by targeted PDFs. Body-only differences are common in benign incremental updates, so severity is raised only when the duplicate carries active content.
  • Embedded URL info EMBEDDED_URL
    One or more URLs were extracted from the document. The URL itself is not a detection — see the per-URL labels for which channel (macro, JS, link annotation, document body, ...) reached each URL.
    URL https://onlineadda.organicemall.com/ckfinder/userfiles/files/xilokapiguvowujolidiwemuj.pdf In PDF document text
    • https://aqua2go.pl/galeria/file/22332896734.pdfIn PDF document text
    • https://efficimm.fr/userfiles/files/46150739123.pdfIn PDF document text
    • http://supermarketdv.ru/files/file/melona.pdfIn PDF document text
    • https://zhansq.cn/upload/file/29980884333.pdfIn PDF document text
    • http://phuocthuan.vn/images/pic/file/60746444908.pdfIn PDF document text
    • http://thibidi.vinadesign.info/uploads/images/files/18065893949.pdfIn PDF document text
    • http://paitoonbox.com/userfiles/files/wadigofabipadetevodis.pdfIn PDF document text
    • https://cplastik.eu/data/cms/file/53460898484.pdfIn PDF document text
    • https://artesapanaderia.xyz/aym_image/files/42116849619.pdfIn PDF document text
    • http://chochosanencino.com/uploads/files/56602285625.pdfIn PDF document text
    • https://chocoinmobiliario.com/wp-content/plugins/super-forms/uploads/php/files/863674744b25deabebc054af37b10613/kozipidolasek.pdfIn PDF document text
    • http://akcjonariusz.com/UserFiles/file/61031951232.pdfIn PDF document text
    • http://portofmiamitunnel.com/system/js/back/ckfinder/userfiles/files/82522403186.pdfIn PDF document text
    • http://minerva-collection.net/files/files/9555773761.pdfIn PDF document text
    • https://radiosmile.hu/upload/file/winikoduvufokovozitop.pdfIn PDF document text
    • http://web5gstore.com/Files/files/miverutewijamikojezase.pdfIn PDF document text
    • http://hunting.kg/userfiles/file/jozotova.pdfIn PDF document text
    • http://i-physiology.ru/upload/97796132845.pdfIn PDF document text
    • http://vouchertiket.com/airplane/ckeditor/uploads/files/fawipepogekufikoworogale.pdfIn PDF document text
    • http://schokofontaenen.de/idata/99865576336.pdfIn PDF document text
    • http://ssaisarang.com/ckfinder/userfiles/files/71623860223.pdfIn PDF document text
    • http://juentai.com/userfiles/files/sipajevebuduruzugozepimo.pdfIn PDF document text
    • https://miamiuniquelimo.com/wp-content/plugins/formcraft/file-upload/server/content/files/1613bd2d31b6cb---21618831427.pdfIn PDF document text
    • https://feedproxy.google.com/~r/Uplcv/~3/1KS0DP0cxss/uplcv?utm_term=descargar+mx+player+androidPDF link annotation
    • http://www.w3.org/1999/02/22-rdf-syntax-ns#In PDF document text
    • http://purl.org/dc/elements/1.1/In PDF document text
    • http://ns.adobe.com/pdf/1.3/In PDF document text
    • http://ns.adobe.com/xap/1.0/In PDF document text
    • http://ns.adobe.com/xap/1.0/mm/In PDF document text
    • http://ns.adobe.com/xap/1.0/rights/In PDF document text
    • http://dejavu.sourceforge.netIn PDF document text
    • http://dejavu.sourceforge.net/wiki/index.php/LicenseIn PDF document text

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000cfeb.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xCFEB 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_01_sfnt_off0000e7fd.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE7FD 18960 bytes
SHA-256: 8b8913c74384acfed65c671e9a23d49d53884d9cfd07e6ac8fbfba649b30b2fe
font_02_sfnt_off000119ca.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x119CA 10976 bytes
SHA-256: e19b19c52326c52c11579f548317032abf9ca7274817d38e0d14b7c4c7cd225d

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